-4.9t^2+355t+87=0

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Solution for -4.9t^2+355t+87=0 equation:


Simplifying
-4.9t2 + 355t + 87 = 0

Reorder the terms:
87 + 355t + -4.9t2 = 0

Solving
87 + 355t + -4.9t2 = 0

Solving for variable 't'.

Begin completing the square.  Divide all terms by
-4.9 the coefficient of the squared term: 

Divide each side by '-4.9'.
-17.75510204 + -72.44897959t + t2 = 0

Move the constant term to the right:

Add '17.75510204' to each side of the equation.
-17.75510204 + -72.44897959t + 17.75510204 + t2 = 0 + 17.75510204

Reorder the terms:
-17.75510204 + 17.75510204 + -72.44897959t + t2 = 0 + 17.75510204

Combine like terms: -17.75510204 + 17.75510204 = 0.00000000
0.00000000 + -72.44897959t + t2 = 0 + 17.75510204
-72.44897959t + t2 = 0 + 17.75510204

Combine like terms: 0 + 17.75510204 = 17.75510204
-72.44897959t + t2 = 17.75510204

The t term is -72.44897959t.  Take half its coefficient (-36.2244898).
Square it (1312.213661) and add it to both sides.

Add '1312.213661' to each side of the equation.
-72.44897959t + 1312.213661 + t2 = 17.75510204 + 1312.213661

Reorder the terms:
1312.213661 + -72.44897959t + t2 = 17.75510204 + 1312.213661

Combine like terms: 17.75510204 + 1312.213661 = 1329.96876304
1312.213661 + -72.44897959t + t2 = 1329.96876304

Factor a perfect square on the left side:
(t + -36.2244898)(t + -36.2244898) = 1329.96876304

Calculate the square root of the right side: 36.46873679

Break this problem into two subproblems by setting 
(t + -36.2244898) equal to 36.46873679 and -36.46873679.

Subproblem 1

t + -36.2244898 = 36.46873679 Simplifying t + -36.2244898 = 36.46873679 Reorder the terms: -36.2244898 + t = 36.46873679 Solving -36.2244898 + t = 36.46873679 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '36.2244898' to each side of the equation. -36.2244898 + 36.2244898 + t = 36.46873679 + 36.2244898 Combine like terms: -36.2244898 + 36.2244898 = 0.0000000 0.0000000 + t = 36.46873679 + 36.2244898 t = 36.46873679 + 36.2244898 Combine like terms: 36.46873679 + 36.2244898 = 72.69322659 t = 72.69322659 Simplifying t = 72.69322659

Subproblem 2

t + -36.2244898 = -36.46873679 Simplifying t + -36.2244898 = -36.46873679 Reorder the terms: -36.2244898 + t = -36.46873679 Solving -36.2244898 + t = -36.46873679 Solving for variable 't'. Move all terms containing t to the left, all other terms to the right. Add '36.2244898' to each side of the equation. -36.2244898 + 36.2244898 + t = -36.46873679 + 36.2244898 Combine like terms: -36.2244898 + 36.2244898 = 0.0000000 0.0000000 + t = -36.46873679 + 36.2244898 t = -36.46873679 + 36.2244898 Combine like terms: -36.46873679 + 36.2244898 = -0.24424699 t = -0.24424699 Simplifying t = -0.24424699

Solution

The solution to the problem is based on the solutions from the subproblems. t = {72.69322659, -0.24424699}

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